Tree stipplescale lichen Placidium arboreum on a large winged elm near a creek, on mossy side opposite to the creek near Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019

Rounded green lobes of tree stipplescale lichen (Placidium arboreum) on a large winged elm near a creek, on mossy side opposite to the creek near Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019